Improvement in middlings-separators



l 3 Sheets-Sheet 1. W. J. FENDER. Mid'dlings-Separators.

Patented Oct. 22,1878.

MPETERS, PHOTOJLITHOGHAFHER. WASHINGTON. D. C.

3 Sheets-Sheet 3.

. W. J. FENDER. M'ddlngs-Separators.

Patented Oct. $22', 1878.

, Z, Tg2 f9.6'-

UNITED STATES PATENLQEEGE.

VILLIAM J FENDER, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE- THIRD HISRIGHT TO JAMES GUTHBERTSON, OF SAME PLACE.

IMPROVEMENT IN MIDDLINGS-SEPARATORS.

Specification forming part of Letters Patent No. 209,165, (lated October22, 1878; application filed August 31, 1878.

To all whom fit may concern Be it known that I, WILLIAM J. FENDER, ofMinneapolis, in the county of Hennepin, in the State of Minnesota, havemade certain Improvements in Middlings-Puriers, of which the followin gis a specification:

The object of this invention is to improve that described in a patentgran ted to me February 9, 1875, No. 159,505; and it consists in theconstruction of the parts that form the improvement, as will be fullyhereinafter described.

In the drawing, Figure 1 is an upright longitudinal view of machine.Fig. 2 is a plan view of the under side of machine, looking upward. Fig.3 is an end view of the machine, showing the operating devices. Fig. 4tis a central cross-section of Fig. 1. Fig. 5 is a broken cross-sectionon line a: a' in Fig. 2. Fig. 6 is a side view of the hanger and itsattachment to the shaker-frame. Fig.7 is a transverse view of Fig. G.

A represents the main frame of the machine, which contains all themoving and operating parts within it or attached to it, in a similarmanner to what is seen in my previous patent, as above cited. B is asuction-fan, fast on transverse shaft b, and is revolved by a belt overpulley on shaft b from a pulley fast on another transverse shaft. C isthe middlingsreceiving hopper, Aat the top of the machine. D is anoscillating convex middlings spreader or feeder, and receives themiddlings upon its convex surface through an adjustable opening, c, atthe bottom of hopper C. This feeder or spreader is attached by its armscl to the shaker-frame, and receives its oscillating mo tion bythereciprocation of the shaker-frame, and causes an even-flowing sheetof middlings to fall from its convex surface into chamber D. The outsideend wall of chamber D is formed of inclined slats d', with air-openingsd between them for the admission of outside aill.

E is the inside inclined wall of chamber D', and extends down `to nearthe top of the reciprocating shaker, with a bottom, e, extending towardlthe outside of chamber D', to intersect an inclined partition, F, thatrises nearly to the top of said chamber' D. The

lower portion of this partition is provided with pivoted slats f, thatcan be adjusted to allow a greater or lesser opening between them. Thispartition F divides chamber D', as seen in Fig. 1, and forms asub-chamber, Gr. Near the bottom of chamber G is a transverse revolvingconveyer, H, made to revolve by a pulley, h, on its shaft through a beltfrom another shaft and pulley. Over this convcyer H, in chamber G, is aninclined cover, h', in which is a slot or opening, h, atl its upperedge, running its whole length. I is the reciprocating shaker-frame,with its Jne bolt-cloth I' on its bottom side, in the usual manner ofconstructing such frames. J is the main shaft, placed transverselyacross and at the head end of the machine, and is revolved by anyconvenient power at the usual speed by pulley J', and from which shaftthe moving part-s of the whole machine are put in motion. j j areeccentrics on shaft J. j j are bands that surround the eccentrics, andhave straps j" eX- tending along the outside of shaker-frame,y

and are attached thereto at their ends by a projecting stud, j. j* is aneye in the arms oil the straps. j5 jf are studs projecting outwardlythrough eyes j* from and fast to the sides of the shaker-frame, the eyej4 being as much larger than the stud in its diameter as the vibrationof the shank at that point is out of a direct line, caused by therevolution of the eccentric upon the shaft J, which gives the outer endsof the straps a perpendicular vibration.

At or near each of the corners of the shaker are the supporting-h.ngers, which are attached to the sides of the shaker-frame by the projecting studs f and j", which have holes through them to receive bolt 1,and have obtuse an gular faces o o, against which is a flat-disk metalwasher, 2, a rubber washer, 3, then the springhanger K, a rubber washer,4, next to the spring-hanger, and a metal washer, 5, having a fiatsurface, bearing upon the rubber washer 4, and conical outer side,bearing against the inside of the bolt-head 1. When put together as seenin Fig. 6 it forms a yielding attachment, free from noise in operation,and never requiring any lubrication to make it work freely. `Theseprojecting studs and j)c may be cast with the plates K', and secured tothe shaker-frame by screws, as seen in Fig. 6. The spring-hangers KeXtend upward, and at their upper ends have a lug, k, upon one side,with abolt-hole, k' through it to receive bolt s".

L is a plate, having a perpendicular slot, l, near its top end, bywhichit is adj Listed up or down, and held when adjusted by the holding-screw l', by turning the screw into the framing. Z" is a curvedlateral slot in plate L, in which is placed bolt k", and passing throughhole k in the lng on the springhanger, and in which curved slot thehanger K can be, by t-he bolt 7c", adjusted to any angle required.

M is a suction-fan, fast on transverse shaft m, and is put in motion bythe pulley m' by belt from pulley m" on main shaft J. Shaft m hasanother pulley, m', at its opposite end, and through abelt gives motionto shaft b and fan B.

N is a brush, placed under the shaker-screen I', and is as long as thescreen, and is made to pass under the screen and sweep the fine adhering dust therefrom in an obtuse angle with the longitudinal sides of theshaker, or in the iigure of a segment of a circle across the under sideof the screen, and at the end of its movement in one direction when oit'the screen it reverses its motion and returns back to the opposite sideof the shaker, and again reverses its motion outside of or beyond thescreen. By this new movement of the brush in the manner and directiondescribed, less power is required to drive the brush, for the brush inits sweep must bear more or less hard against the cloth of the screenand bend the bristles in order to successfully brush oft' the dust, andas the brush approaches the sides of the shaker or screen the angleincreases; hence it goes out of contact with the screen gradually, andthebristles assume their normal or straight position before the brush isreturned in the opposite direction.

O is a short horizontal shaft, secured in proper bearings at the head ofthe machine, and has pulley o at its outer end, which is driven by beltfrom pulley o' on shaft J. P is a worm-gear on shaft O, and revolveswith it, gearing into toothed gear-wheel Q, which revolves 011 a shortshaft. R is a pitman, secured to wheel Q by bolt r in slot q, its otherend secured to segment gear-wheel S by bolt or wrist-pin, by whichconstruction, as the wheel Q, revolves, it gives to the segment orquarter wheel an oscillating or vibrating motion in opposite directions,and gearing into this quarter-wheel is a toothed pinion, s, on shaft T,that extends longitudinally under the Screen.

Secured to shaft T are pulleys t and t'. Pulley t is near the head endof themachine, and pulley t' is near the opposite end. Pulley t is muchlc rger in diameter than pulley t'. y

U is acord, one end attached to pulley t, so that it will run on theoutside of the pulley and pass around it, then go to the side of themachine, pass over a pulley, u, then back to the opposite side of themachine, around another pulley, u', then to pulley t again, and besecured, as was the opposite end. A like cord passes around pulley t',and operates in the same manner as the cord around pulley t.

The brush N is attached securely to these cords that are aroundpulleysd.L and t', and the vibration of the quartenwheel S turningpinion s in one direction revolves the pulleys t and t' in the samedirection, carrying the brush by the cords U to one side of the machine,when the quarter-wheel is moved in the opposite direction, causing thepinion s to reverse its motion, and with it the motion of pulleys t andt', and make the brush sweep across the screen in the reverse direction.

Pulley t being larger than pulley t', a revolution of it will carry theend of the brush in the same direction much farther thank the pulley t';hence the position of the brush as it sweeps toward both sides of themachine is seen, in full and dotted lilies, in Fig. 2.

By this construction the brush is made to perform a new movement in itssweep under the screen, saving power by the gradual departure ofi' theedge of the screen, or in its reverse movement in coming onto thescreen, and then reversing out of contact with the screen, and at thesame time does not wear the cloth on the shaker by the reversing of thebrush under the screen against the cloth.

V is a gearwheel at the end of a conveyer V', at the head of themachine, and is put in motion by the gear-wheel o on shaft 0.

The middlings being fed into hopper G and gaged at opening c, then goonto the vibrating convex spreader D, and by it are distributed in aneven sheet into chamber D', near the head of the machine. Suction-fan B,being in motion, draws the air from outside the head of the machinethrough air-spaces d" into chamber D', taking from the middlings all, ornearly all, the light stuft', passing it through air-spaces betweenslatsfin the partition that divides chamber D' from chamber G, theninto' and through the fan-case of fan B into exit-pipe B', and out ofthe machine at opening B", as indicated by arrows.

lf there be heavy dust carried into chamber G, and too heavy to becarried out with the light particles at B" by fan B, such heavy dustwill fall down to the bottom of chamber G through opening h" intoconveyer H, and be forced out of the side of the machine at opening H'in the out end of the conveyercase. This operation prepares themiddlings for screening by separating most of the foreign matter andleaving the same nearly pure.

M is a second and larger suction-fan than B, and draws air fromunderneath the reciprocating screen through air-spaces between thegathering-slats at the bottom of the machine, thence passing upwardthrough the screen in contact ,with the middlings and other particlesthat may have been carried there; and this air-current, permeating allparts of the screen as it reciprocates, tends to KAL-*M* and does liftthe light dust and coarse particles too large to pass through the screenor go off as tailings or to be carried up with the current of air intofan M, andv thence be expelled out of the machine through exitpipe Ml atM.

In order to graduate or control the force of the air-current caused byfan M, a set of inclined partitions, w, are arranged in a chainber abovethe screen, in connection with pivoted valves which valves are securedat their lower edges to a rod, y, that projects out of the machine, andby which the openings between the partitions and valves may be enlargedor diminished at will.

Having thus described my invention, what I claim is- 1. In amiddlings-purier, the combination of the chambers D and G, divided' bypartition F, and conveyer H with the suction-fan B, substantially as andfor the purposes de-l end moving faster than the other and obliquely tothe direction of the ow of the middlings on the screen, substantially asdescribed.

7. The series of pivoted valves w, inclinedY partitions w, andregulating-rod y, in combination with the suction-fan M, as and for thepurposes described.

8. In a middlings-purier, the combination of the suctionLfan M, shakerI, screen I', and brush N, sweeping the under side of the screen at anobtuse angle with the flow ot' the middlin gs on the screen, andreversing its movement while off the cloth, substantially as described.y

WILLIAM J. FENDER.

Witnesses:

J. MAsoN GoszLnR, NEWTON CRAWFORD.

